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Accident description
Last updated: 19 October 2017
Status:Final
Date:Saturday 17 October 1998
Time:02:30
Type:Silhouette image of generic BE99 model; specific model in this crash may look slightly different
Beechcraft 99 Airliner
Operator:Alpine Aviation
Registration: N299GL
C/n / msn: U-102
First flight: 1969
Total airframe hrs:39685
Engines: 2 Pratt & Whitney Canada PT6A-28
Crew:Fatalities: 0 / Occupants: 2
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 0 / Occupants: 2
Airplane damage: Substantial
Airplane fate: Written off (damaged beyond repair)
Location:Missoula, MT (   United States of America)
Phase: Approach (APR)
Nature:Cargo
Departure airport:Billings-Logan International Airport, MT (BIL/KBIL), United States of America
Destination airport:Missoula-Johnson-Bell Field, MT (MSO/KMSO), United States of America
Flightnumber:5010
Narrative:
The aircraft had completed a flight from Billings, MT when the co-pilot started a visual approach to runway 29. He initiated the flare too high above the runway, and as the aircraft floated toward the departure end of the runway, the airspeed began to decrease. As the airspeed decreased and the aircraft began to sink, the pilot-in-command called for the co-pilot to add power, which he did. The aircraft then was about to stall, causing the pilot-in-command to take control and initiate a go-around. Control was difficult due to a full nose-up trim. During the attempted go-around, the pilot-in-command called for the flaps to be raised, but the co-pilot first pushed the throttles forward to maximum power as called for in the B-99 Pilots Operating Manual rejected landing checklist before initiating flap retraction. The aircraft then descended into the dirt surface adjacent to the runway.
The co-pilot began his training with the operator about three weeks prior to the accident. At that time, he had accumulated approximately 215 hours of flying time, none of which was in the Beech 99 or other turbo-prop powered aircraft. During his training program, he accumulated 10.6 additional hours, none of which was at night.

Probable Cause:

PROBABLE CAUSE: "The pilot-in-command's delayed remedial action in response to the co-pilot's improper landing flare, and the co-pilot's application of excessive (full nose-up) trim during the landing flare as taught in the operator's initial aircrew training program. Factors include the co-pilot's improper flare and his lack of total experience in this type of aircraft".

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 12 months
Accident number: SEA99LA003
Download report: Summary report

Sources:
» Scramble 235


Photos

photo of Beechcraft 99 N299GL
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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Billings-Logan International Airport, MT to Missoula-Johnson-Bell Field, MT as the crow flies is 440 km (275 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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